package sdau.computer;

public class DemoJUnit {
    public int add(int a, int b) {
        return a + b;
    }
    public int sub(int a, int b) {
        return a - b;
    }
    public int cheng(int a, int b) {
        return a * b;
    }
    public int chu(int a, int b) {
        return a / b;
    }

}
